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45 lines
730 B
C
45 lines
730 B
C
/* j/2/snag.c
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**
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*/
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#include "all.h"
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/* functions
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*/
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u3_noun
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u3qb_snag(u3_atom a,
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u3_noun b)
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{
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if ( !_(u3a_is_cat(a)) ) {
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return u3m_bail(c3__fail);
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}
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else {
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c3_w len_w = a;
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while ( len_w ) {
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if ( c3n == u3du(b) ) {
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return u3m_bail(c3__exit);
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}
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b = u3t(b);
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len_w--;
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}
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if ( c3n == u3du(b) ) {
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return u3m_bail(c3__exit);
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}
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return u3k(u3h(b));
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}
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}
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u3_noun
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u3wb_snag(u3_noun cor)
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{
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u3_noun a, b;
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if ( (c3n == u3r_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0)) ||
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(c3n == u3ud(a)) )
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{
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return u3m_bail(c3__exit);
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} else {
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return u3qb_snag(a, b);
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}
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}
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